Sep 2007
In my Mack truck somewhere in a Chicago suburb smo
Illinois - Smoking is prohibited within a minimum distance of 15
feet from entrances, exits, windows that open, and ventilation
intakes that serve an enclosed area where smoking is prohibited
under this Act so as to ensure that tobacco smoke does not
enter the area through entrances, exits, open windows, or other

Basicly any public building.

info here: